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大型深基坑逆作開挖變形性狀研究

發(fā)布時間:2018-07-28 15:55
【摘要】:在城市交通繁忙和緊鄰高層建筑物的地段修建大型地下車站,如何減少對路面交通的影響,保護臨近建筑物的安全,同時又保證工期,降低造價,采用明挖順作和蓋挖逆作相結(jié)合的修建方法,可以較好地解決上述工程難題。 首先,本文對基坑工程的發(fā)展、逆作法的優(yōu)缺點和適用范圍、深基坑變形機理及國內(nèi)外研究現(xiàn)狀進行了介紹,在此基礎(chǔ)上總結(jié)了基坑變形的影響因素。 其次,以廣深港客運專線福田站為工程背景,對其工程概況進行了簡單介紹,包括車站的基本情況,工程地質(zhì)、水文地質(zhì)及氣候特征,基坑分段與圍護方案,基坑降水和開挖等。針對福田站工程結(jié)構(gòu)復雜、規(guī)模大、工期緊,地質(zhì)條件復雜,安全風險大等特點,提出了施工過程中重難點問題的應(yīng)對措施。 然后,以基坑變形性狀為研究對象,運用MIDAS/GTS有限元軟件建立逆作開挖段的三維模型,對開挖過程中地下連續(xù)墻深層水平位移、坑底土體隆起和坑外地表土體沉降等相關(guān)內(nèi)容進行了較深入的研究,并通過改變圍護結(jié)構(gòu)參數(shù)和超載大小,分析了地下連續(xù)墻厚度、墻體嵌固深度、墻體彈性模量、地表超載和立柱樁樁徑共計五個因素對基坑變形的影響,以期實現(xiàn)基坑圍護結(jié)構(gòu)設(shè)計優(yōu)化。 最后,福田站在基坑施工過程中,由第三方進行了全面、系統(tǒng)的監(jiān)測,,建立了五級預警體系。將有限元數(shù)值模擬結(jié)果和實測數(shù)據(jù)進行分析比較,總結(jié)模擬計算得出的基坑變形與工程實際之間的差異并分析原因。本文的研究具有一定的實用價值,可為今后同類工程建設(shè)和研究工作提供借鑒參考。
[Abstract]:How to reduce the impact on road traffic, protect the safety of adjacent buildings, at the same time guarantee the construction period and reduce the cost of constructing large underground stations in the areas with heavy traffic and adjacent high-rise buildings, The construction method combining open excavation with cover excavation and reverse construction can solve the above problems well. Firstly, this paper introduces the development of foundation pit engineering, the advantages and disadvantages and application scope of the reverse method, the deformation mechanism of deep foundation pit and the research status at home and abroad, and summarizes the influencing factors of foundation pit deformation. Secondly, taking the Futian station of Guangzhou-Shenzhen passenger dedicated line as the engineering background, this paper briefly introduces the general situation of the project, including the basic conditions of the station, engineering geology, hydrogeology and climate characteristics, foundation pit segmentation and enclosure scheme. Foundation pit dewatering and excavation. In view of the complex structure, large scale, tight construction period, complex geological conditions and high safety risk of the Futian Station, the countermeasures of the heavy and difficult problems in the construction process are put forward. Then, taking the deformation behavior of foundation pit as the research object, using the MIDAS/GTS finite element software to establish the three-dimensional model of the inverse excavation section, the horizontal displacement of the underground continuous wall in the course of excavation is analyzed. By changing the parameters of enclosure structure and overloading, the thickness of underground continuous wall, the depth of embedded wall, the elastic modulus of wall are analyzed, which are related to the uplift of the bottom soil and the settlement of the surface soil in the pit, and by changing the parameters of the enclosure structure and the size of the overload, the thickness of the underground continuous wall is analyzed. In order to optimize the design of retaining structure of foundation pit, the influence of five factors, namely ground overload and pile diameter of vertical column, on the deformation of foundation pit is discussed in this paper. Finally, Futian station in the foundation pit construction process, by a third party to carry out a comprehensive, systematic monitoring, the establishment of a five-level early warning system. The finite element numerical simulation results are compared with the measured data, and the difference between the foundation pit deformation and the engineering practice is summarized and the reasons are analyzed. The research in this paper has certain practical value and can provide reference for similar engineering construction and research work in the future.
【學位授予單位】:華南理工大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:TU753

【參考文獻】

相關(guān)期刊論文 前10條

1 王建華,徐中華,陳錦劍,王衛(wèi)東;上海軟土地區(qū)深基坑連續(xù)墻的變形特性淺析[J];地下空間與工程學報;2005年04期

2 王昌洪;;廣深港客運專線福田站基坑第三方監(jiān)測方案設(shè)計[J];城市勘測;2011年04期

3 成峰;張遠芳;那姝姝;劉威;;北京地區(qū)深基坑變形特性研究[J];工業(yè)建筑;2012年S1期

4 王增勇;;深基坑地下連續(xù)墻開挖施工監(jiān)測[J];技術(shù)與市場;2011年04期

5 王恒;;基于青年大街站分析淺埋暗挖施工中的若干問題[J];交通標準化;2011年08期

6 尹桂萍,王運巧,范玉青,梅中義;用ANSYS軟件分析數(shù)控加工中弧形件的變形[J];航空維修與工程;2003年03期

7 朱浮聲;巖石的強度理論與本構(gòu)關(guān)系[J];力學與實踐;1997年05期

8 石端文;;超大、超深地下車站基坑支護結(jié)構(gòu)設(shè)計與開挖方案研究[J];建筑監(jiān)督檢測與造價;2011年04期

9 吳軍;;深圳地鐵1號線續(xù)建工程前海灣站巖土工程詳細勘察[J];鐵道勘察;2009年06期

10 俞建霖,龔曉南;基坑工程變形性狀研究[J];土木工程學報;2002年04期

相關(guān)碩士學位論文 前8條

1 南碩;雙排樁支護結(jié)構(gòu)設(shè)計與有限元分析[D];河北工程大學;2011年

2 李元曦;基坑工程安全控制的研究與探討[D];華南理工大學;2011年

3 孫永剛;廣州地鐵三號線客村~大塘盾構(gòu)區(qū)間盾構(gòu)機掘進技術(shù)研究[D];西南交通大學;2003年

4 鄭官塘;福州地區(qū)內(nèi)撐式地下連續(xù)墻基坑支護的應(yīng)用研究與實踐[D];重慶大學;2007年

5 郭雷;考慮卸荷影響的基坑三維計算理論研究[D];浙江大學;2008年

6 顧洪源;大跨度大深度地下結(jié)構(gòu)蓋挖逆筑法施工關(guān)鍵技術(shù)研究[D];西南交通大學;2010年

7 張俊;基坑工程風險管理研究[D];華南理工大學;2012年

8 王琦琳;逆作法施工技術(shù)在高層建筑中的應(yīng)用研究[D];遼寧工程技術(shù)大學;2012年



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